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List: cgit
Subject: [PATCH] shared.c: Only setenv() if value is non-null
From: cgit () cryptocrack ! de (Lukas Fleischer)
Date: 2011-09-14 9:52:43
Message-ID: 1315993963-8278-1-git-send-email-cgit () cryptocrack ! de
[Download RAW message or body]
Some setenv() implementations (e.g. the one in OpenBSD's stdlib)
segfault if we pass a NULL value. Only set environment variables if the
corresponding settings are defined to avoid this.
Note that this is a minor behaviour change as environment variables were
supposed to be set to an empty string if a setting was undefined. Given
that this feature isn't part of any official release yet, there's no
need to worry about backwards compatibility, really. Change the
documentation accordingly.
Signed-off-by: Lukas Fleischer <cgit at cryptocrack.de>
---
cgitrc.5.txt | 2 +-
shared.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 4721c1e..a22423b 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -500,7 +500,7 @@ Also, all filters are handed the following environment variables:
If a setting is not defined for a repository and the corresponding global
setting is also not defined (if applicable), then the corresponding
-environment variable will be an empty string.
+environment variable will be unset.
MACRO EXPANSION
diff --git a/shared.c b/shared.c
index 75c4b5c..0c8ce3e 100644
--- a/shared.c
+++ b/shared.c
@@ -392,7 +392,7 @@ void cgit_prepare_repo_env(struct cgit_repo * repo)
p = env_vars;
q = p + env_var_count;
for (; p < q; p++)
- if (setenv(p->name, p->value, 1))
+ if (p->value && setenv(p->name, p->value, 1))
fprintf(stderr, warn, p->name, p->value);
}
--
1.7.6.1
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